Water cooling a GTX460. Are VRM sinks necessary?

I'm watercooling my old MSI GTX460 Cyclone with a Swiftech universal WB. It's a 125W card with 2x6pin PCIe cables. I'm using a 120mm case fan to blow air directly onto the card. The original HSF did not cover the VRM/Mosfets so I'm thinking it's fine. This card is only being used for Benchmarking. It has a stock voltage of 950mv and runs for fairly long bursts at its BIOS max of 1212mv (Not hard modded yet). Just wondering if I should get some aftermarket sinks for the power section.

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For what you are doing to the card, I would have them on there, sure. At least point a fan at them...

good fan will be enough even at higher voltage